Ejemplos de uso de villus
1. The traditional methods of testing for Down‘s syndrome are the amniocentesis, where samples are taken directly from the woman‘s amniotic sac; or by chronic villus testing, which takes cells from the placenta.
2. US health insurance does not cover the cost, which is similar to that of an ultrasound (which does not always accurately predict the baby‘s sex). Two invasive techniques, chorionic villus sampling (at 11 weeks) and amniocentesis (from 18 weeks), also provide information about genetic disorders (the kit does not), but can cause harm to the fetus in a small minority of cases.